问题详情

Whatdoestheunderlinedword"they"inParagraph6referto？
A．Theparticipantsinthestudy.
B．Theresearchersinthestudy.
C．Theerrorsmadeduringthestudy.
D．Thedatacollectedfromthestudy.
请帮忙给出正确答案和分析，谢谢！